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    #1

    Help Identifying Vintage Measuring Device

    Hi all!
    Could you help please:

    1 What is this device for, and
    2 Who may need it now?
    On the box and on the board it reeds the same:
    74116D trans meas set
    SLS 1505D SHT 74/4
    serial N ... made in England by
    Standard Telephones & Cables Ltd London
    It is portable, of late 60's according to the date on the part inside, pre-printed-board assembly. Has inside some weird glass unit, a little bulb-like thing but with 3 wires (transistor?). I am very curious to find this out, so if there is no info available, would you please point to a right direction for a search. Thanks!
    Attached Files
    Tags: None
    #2
    Re: Help Identifying Vintage Measuring Device

    I think it's a transmission measurement set used to measure signal levels in telephone lines. This isn't my area of expertise, so I could be totally off on that.

    Comment

      #3
      Re: Help Identifying Vintage Measuring Device

      Originally posted by tollfree View Post
      Has inside some weird glass unit, a little bulb-like thing but with 3 wires (transistor?).
      A vacuum tube maybe?? (See pic below to confirm) They come in different sizes and the inner wires are different.


      This unit may be something used with audible sounds.
      Attached Files
      The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

      Comment

        #4
        Re: Help Identifying Vintage Measuring Device

        There is a good read on this company on the site below.

        http://www.gracesguide.co.uk/Standar...nes_and_Cables
        The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

        Comment

          #5
          Re: Help Identifying Vintage Measuring Device

          yyonline, Dgtech: thank you for your input. The bulb-like thing is a nickel size glass tablet with a little dot inside and three copper wires going out of it. There are two of them side by side: one is connected to the circuit, and another is SPARE! The company history kindly pointed to by Dgtech lists 1968 as "STC Footscray(?) announced new semiconductor devices", so I guess this realy may be the first transistor! My date reading on the right round db-meter is 1967. Would like to lean more on what might be the use of this nowadays...

          Comment

            #6
            Re: Help Identifying Vintage Measuring Device

            Blurb on device type:

            A Transmission Measuring Set is designed to fulfill all type of requirements for determination of signal level, insertion loss, transmission loss and return loss in cable circuits used in audio telephones.
            Mann-Made Global Warming.
            - We should be more concerned about the Intellectual Climate.
            -
            Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
            - Dr Seuss
            -
            You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
            -

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              #7
              Re: Help Identifying Vintage Measuring Device

              ... learn

              Comment

                #8
                Re: Help Identifying Vintage Measuring Device

                this is a spare one comparing to a nickel, you cannot really see the tiny dot inside.
                Attached Files

                Comment

                  #9
                  Re: Help Identifying Vintage Measuring Device

                  Transistors have been around in a usable form since 1947 and in metal cans at least since sometime in the 50's.
                  There was some experimentation with using glass because it was cheaper than metal cans but I think that was over by the 60's.

                  OTOH, it may be a totally custom part built in-house by someone or another.

                  Why don't you draw out the schematic and figure out what it should be.
                  .
                  Mann-Made Global Warming.
                  - We should be more concerned about the Intellectual Climate.
                  -
                  Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
                  - Dr Seuss
                  -
                  You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                  -

                  Comment

                    #10
                    Re: Help Identifying Vintage Measuring Device

                    Thank you PCBONEZ, I didn't know the whole story on transistor inclosures. What home-made? - I cannot think of any other 3-connector thing. Might try to draw -- it will be fun, colored wires I still wonder what would be the use of this device now, there are digital transmission meters, they are at least smaller...

                    Comment

                      #11
                      Re: Help Identifying Vintage Measuring Device

                      Post some pics of the circuit board inside. It's always fun to poke around at yesterday's electronic relics. I'm sure someone will have more info by looking at the pictures.
                      The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

                      Comment

                        #12
                        Re: Help Identifying Vintage Measuring Device

                        Here we go
                        Can't wait to sort it out, thank you very much for your input, guys!
                        Attached Files

                        Comment

                          #13
                          Re: Help Identifying Vintage Measuring Device

                          Its a analog phone line tester for the old pots lines Pre any digital switching, totally useless now. Might find a collector that collects old juck that might be interested in it.

                          Comment

                            #14
                            Re: Help Identifying Vintage Measuring Device

                            Thank you Brethin, great news really! Could you guess about the glass tablet device too, what is it and what's the function there?

                            Comment

                              #15
                              Re: Help Identifying Vintage Measuring Device

                              That thing is in really good shape. - Nice find.
                              .
                              Mann-Made Global Warming.
                              - We should be more concerned about the Intellectual Climate.
                              -
                              Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
                              - Dr Seuss
                              -
                              You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                              -

                              Comment

                                #16
                                Re: Help Identifying Vintage Measuring Device

                                The glass bit looks like a spark gap or surge arrestor of some type. Hence the 'spare' one under the clamp next to the soldered in one. Might be filled with neon or similar gas that will 'fire' when voltage exceeds the rating.

                                Love the wiring! Precise bends and the looming is sweet!
                                Last edited by Toasty; 08-20-2011, 02:20 AM.
                                veritas odium parit

                                Comment

                                  #17
                                  Re: Help Identifying Vintage Measuring Device

                                  If ya ever want to sell it, I know an guy that collects old telephones. He'd probably love that thing.
                                  "Its all about the boom....."

                                  Guns kill people like spoons made Rosie O'Donnell fat.

                                  We now return you to your regularly scheduled drinking.

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